Coal-cutting machine.



No. 862,831. PATENTED AUG. 6; 1907 J. LIPPIS.

GOAL CUTTING ma ma APPLIOETION FILED NOV. 22, 1906.

.w Eiiiiiiiiii V V V WITAAESSES: ZNVENTQR.

mtg Lw vJOHN LlPPIS, OF COALOREEK, COLORADO.

COA -CUTTING MJLGHINE.

Specification of Letters Patent Patented Aug. 6., 1907.

Original application filed November 8, 1906, Serial No. 342,531. Divided and this application filed November 22, 1906.

- Serial No 344,656.

To all whom it may concern:

Be it known that 1, JOHN Liens, a citizen of the United States of America, residing at Coalcreek, in the county of' Fremont and State of Colorado, have invented certain new and useful Improvements in Coal- (lutting Machines, of which the following is a specificatron. I

This invention relates to iinprovements in coal cutting machines and has for its object to provide means whereby a machine of the class named may readily be placed and held in a tilted position to permit the cuttors to penetrate the coal in close proximity to the foot of the wall in the tunnel or room of the mine, and which thus obviates the use of separate appliances to this purpose. I attain these objects by the mechan ism illustrated in the accompanying drawings, in the various views of which like parts are similarly designated and in which I Figure 1-reprcsents a plan view of acoal cutting machine having my improved sippliance, Fig. 2a side 'clcvation thereof, Fig. 3-a front elevation looking from a point a, Fig l, l ig. la fractional plan view .of the lower member of the frame showing the thereto applied tilting means, and Fig. a section taken along a line 5-5, Fig. 4i

The coal cutting machine illustrated 'in the drawingsis composed of two. connected, superposed members 5 and 6, the upper one of which'ca-rries the motor 7 and gearing 8, by which the cutting chain is actuated, while the lower one 6 consists of aplate, which in practice, is in contact with the upper surface of the so-called pan employed to guide or convey the machine, or with the fioor oi the tunnel or room of the mine in which the device is operated.-

9 designates the cutter bar, which projecting from the machine, is pivotally supported thereon at its inncr extremity, intermediate the two members 5 and 6.

nu endless chain it" armed with cutting tools 11 is movablyinounted on the arm in engagement with suitable wheels 12mm 13 at its extremities.

'lhe nachine is furthermore provided with a series oi sheaves l t which in cooperation with a power driven sprocket wheel 15 and a therewith engaging chain 16, are adapted to impel the machine and' the pivoted cutter in various directions.

To permit the cutterbar to penetrate into the lowermost portion of the coal wall, in close proximity to the line along which it adjoins the floor of the tunnel or room, the machine has heretofore been inclined by placing a prop or skid below the side of the lower member 6, opposite to the side from which the cutter will effect a great saving of time, labor and consequent expense.

The lower member of the coal cutting'machine is to this end, provided fn proximity toits edge opposite from the side from which the cutter bar projects, with a preferably rectangular, oblongslot 17, which in practice contains a correspondingly shaped fiat bar or lever 18. This bar is iulcrumed at one of its extremities by means of a pin 19 while at its opposite end it has a pair of upwardly extending lugs 20 between which a nut 21 is pivotally held.

A vertical screw 22, having a capstan head 23 is rotatably mounted in the upper member 5 of the machine,'its lower threaded portion engaging the internal coiiperative thread of the nut 21. 3

A collar 24 placed on the screw against the lower surface of the upper member, holds the former against longitudinal displacement.

Wlfen itis desired to incline the cutter bar for the purposes hercinbefore described, the screw 22 is turned by means of a bar thrust inone of the apertures of its head, with the result that the irce end of the bar 19 engages the floor or surface upon which the machine is placed. Further rotary movement of the screw in the same direction will cause the adjacent portion of the lower member of the machine to rise from the floor and effect the consequent inclination of the cutter arm.

The machine illustrated in the drawings is of the type'describ i and claimed in my application for patent, Serial 342,531, filed Nov-8, 1906. It should be understood however, that the tilting means may the applied with equal results to machines of similar operation but of different construction.

Having thus described my invention what I claim lSI 1.- In a coal cutting machine, the combination wlth the frame and the cutter member extending therefrom; of a rigid bar pivotally held at one of its extremities in a slot in the said frame and normally in a plane with its lower srirface, and means upon the frame to depress the free extremity of thesaid bar.

2. In a coal cutting machine, the combination with the frame, and the cutter member, extending therefrom, of a of its extremities'iu a slot in the Said plate and normally 1O "rigid bar pivotally' held at one of its extremities in a slot in a plane with the lower surface, and means upon the Ln the said fmfiw, and normally in a plane wjth its lewel: frame to depress the free extremity of the said bar. snrtaceu nnt movably mounted upon the said member and In testimeny whereof I have atfixed my signature in 5" a screwrotatubly heldpn the said frame in opemtlve enpresence of two witnesses.

.Jgagement with the nut. I 3., In a Goal cutting machine the-combination with the Witnesses:

iggme including a flat suppq'rtiug plate andu cutter mem- JAs'. W. GBOIAM, her mounted thereon of a rigid bar plvotally held z 1t one JOSEPH D. BLUNT. I e

' JdHN LIPPIS'. 

